I would bring that up to your dealer! If your hearing funny noises and are loosing oil pressure I'd tell them immediately. Also ask them about the long term effects this has to causing your engine. Since your still under warranty I'd might even want a new motor.
2001 ws6, 40k miles, Ls3 416 stroker, short block built by PER the rest by me. LPE Ls3 heads milled to 12-1 comp, FAST 102, NW 102, kooks 2", dual DMH cutouts, Magnaflow C/B, BTR cam + springs. Full UMI suspension.